JP6734156B2 - Anchor fixing structure and anchor fixing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to an anchor fixing structure and an anchor fixing method for fixing an anchor at a reinforcing bar.

As an anchor fixing structure for accurately fixing an anchor at a bar arrangement portion, there is one that uses an anchor fixing frame. For example, by fixing the upper and lower ends of the anchor bolts to the upper and lower frames respectively, an anchor fixing structure with the anchor bolts and the frame is formed in advance, the anchor fixing structure is installed and placed at a predetermined position, and then concrete is poured (See Patent Documents 1 and 2).

In Patent Document 3, after fixing the frame main body on abandoned concrete and adjusting the horizontal level of the frame main body using an adjuster bolt, the anchor bolt is inserted from above to be fixed to the frame main body, and the upper end of the anchor bolt is fixed. It describes that a template (frame) is set to form an anchor fixing structure, and concrete is poured.

On the other hand, Patent Document 4 describes an example of a template provided with leg reinforcing bars. The leg reinforcing bars are welded to the reinforced main body reinforcing bars to install the template, and the upper end of the anchor bolt is attached to the template. It is described to mount and fix the position.

JP 2001-73458 JP JP 2015-55079 JP Patent No. 5620839 JP 2002-339374 JP

It is difficult to arrange the anchor fixing structure or to form the anchor fixing structure as described above in a place where the reinforcing bars are densely arranged, such as a beam, a pillar, and a connecting portion of the foundation. In Patent Document 4, the anchor fixing structure is simplified by welding the leg reinforcing bars to the main reinforcing bars, but in this case as well, welding and the like may take time and the position of the template may become slightly unstable.

Further, even if the anchor bolts are fixed by these anchor fixing structures, there is a possibility that the position of the anchor bolts may be displaced when the concrete is placed and the positional accuracy of the anchor bolts may be deteriorated.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide an anchor fixing structure or the like that can easily and highly accurately fix anchors even in a place where bar arrangements are dense.

A first aspect of the invention for achieving the above-mentioned object is an anchor fixing structure for fixing an anchor to a reinforcing bar, which is a frame and a fixing jig for fixing the frame to the reinforced bar. And a template for attaching an anchor, which is installed above the pedestal and can be fixed to the pedestal, and the template has a vertical position adjustment for adjusting the vertical position of the template. an anchor fixed structure, characterized by chromatic means.

In the present invention, the frame is fixed to the reinforcing bar using the fixing jig, and the anchor is fixed using the frame and the template. Therefore, by fixing the pedestal to the rebars at the upper end of the bar after arranging it, the gantry can be installed easily and accurately even in the densely arranged bar, and the anchor is easily and highly accurately fixed by the strong structure of the gantry and the template. can do. Therefore, it is possible to efficiently and economically construct a high-quality structure, which leads to a reduction in construction period and labor. Further, since the gantry can be fixed to the reinforcing bar by using a fixing jig, there is no need for labor such as welding to the reinforcing bar.

The template preferably has a horizontal position adjusting means for adjusting the horizontal position of the template. Further, it is also desirable to have a vertical position adjusting means for adjusting the vertical position of the template.
As described above, by providing the position adjusting means in the horizontal direction or the vertical direction as the configuration of the template, the position of the template with respect to the mount can be finely adjusted and the anchor can be fixed with high accuracy.

It is preferable that the fixing jig fixes the pedestal to the reinforcing bar by vertically sandwiching the reinforcing bar between the pedestal and the fixing jig.
This allows the pedestal to be easily fixed to the reinforcing bar.

For example, the gantry is a plate member provided with a protrusion protruding upward from the plate member, the plate member has an opening, and the protrusion is a cylindrical body provided so as to surround the opening. , The template has an opening.
Using these openings and the internal space of the cylinder, it is possible to perform work such as pouring concrete.

It is desirable that the reinforcing bar is a reinforcing bar at the upper end of the reinforcing bar.
After arranging, the pedestal and the like can be easily installed by fixing the pedestal to the reinforcing bar at the upper end of the reinforced area.

A second aspect of the present invention is an anchor fixing method for fixing an anchor to a reinforcing bar, wherein a fixing jig is used to fix the gantry to the reinforced bar, and the template is installed above the gantry. It is fixed to the frame and, possess the steps of mounting the anchor to the template, and the position adjusting means having the above template, anchoring methods vertical position of said template and said Rukoto adjusted Is.

ADVANTAGE OF THE INVENTION According to this invention, the anchor fixing structure etc. which can fix an anchor easily and highly accurately can be provided also in the place where the reinforcement is dense.

Example of reinforcement at the connection between foundation beam and column The figure which shows the state which fixed the gantry 1 to the reinforcing bars 27 and 29. The figure which shows the state which installed the template 11 above the mount 1. The figure which shows the state which installed the anchor bolt 31. Figure showing the state of finishing the concrete pouring The figure which shows the state which fixed the mount 1a to the reinforcing bars 27 and 29. The figure which shows the state which installed the template 11a above the stand 1a. The figure which shows the state which installed the anchor bolt 31.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
First, the anchor fixing method and the like according to the first embodiment of the present invention will be described. The embodiment of the present invention will be described with reference to an example in which anchor bolts (anchors) for joining columns are fixed at the reinforcing bar portions of the joints that join the vertical and horizontal foundation beams that are the main body structure and the columns.

FIG. 1 is a view of an example of the bar arrangement at this joint as seen from above, and shows only the beam main bar (hereinafter sometimes referred to as the top bar) at the upper end of the foundation beam. Reinforcing bar 27 in FIG. 1 is the upper end bar of the lateral foundation beam, and reinforcing bar 29 is the upper end bar of the longitudinal foundation beam. These reinforcing bars 27, 29 are arranged so as to intersect at the joint.

Although not particularly shown, under the reinforcing bars 27 and 29, cage reinforcements and beam reinforcements at the lower end of the foundation beam are complicatedly disposed on concrete such as discarded concrete. It is difficult to fix the bolt. Moreover, even if the anchor is fixed with difficulty, there is a possibility that the position of the anchor may be displaced when the concrete is poured.

In view of this, in the present embodiment, after finishing the above-mentioned bar arrangement at the joint, the frame 1 (frame) is installed on the reinforcing bars 27, 29 as shown in FIG. 2 and fixed to the reinforcing bars 27, 29. FIG. 2A is a top view of the state where the gantry 1 is fixed to the reinforcing bars 27 and 29, and FIG. 2B is a vertical cross-sectional view taken along the line AA of FIG. 2A. Is. The same applies to FIGS. 3 and 4 described later.

The gantry 1 is configured by providing a plate member 3 with a tubular body 5 (protruding portion).

The plane of the plate member 3 is substantially rectangular, and has a substantially rectangular plane opening at the center. The opening of the plate member 3 communicates with the inside of the tubular body 5.

The tubular body 5 is provided so as to project upward from the plate material 3 in a substantially vertical direction. The plane surface of the cylindrical body 5 has a substantially square V shape, and is arranged so as to surround the opening of the plate member 3.

The gantry 1 is fixed to the reinforcing bars 27 and 29 by using the bolt 7, the nut 8 and the angle member 9 as a fixing jig.

That is, the angle member 9 is arranged below the gantry 1, the reinforcing bar 27 or the reinforcing bar 29 is vertically sandwiched between the plate member 3 and the angle member 9 of the gantry 1, and the bolts are formed in the holes (not shown) of the plate member 3 and the angle member 9. The gantry 1 is fixed to the reinforcing bars 27, 29 by tightening the nut 8 at the tip through the 7.

After mounting the gantry 1 on the reinforcing bars 27 and 29 in this way, the template 11 (frame) is installed above the gantry 1 as shown in FIG. In this embodiment, the gantry 1, the template 11, the angle member 9 and the like constitute an anchor fixing structure 100 for fixing the anchor.

The template 11 is used for attaching anchor bolts, and is formed by providing a plate member 12 having a substantially rectangular flat surface with an opening 13 and a hole 15. A convex plate 21 is provided on the lower surface of the plate member 12.

The opening 13 is provided at the center of the plane of the plate material 12. The plane position of the opening 13 corresponds to the opening of the plate member 3 of the gantry 1 described above.

The holes 15 are for inserting anchor bolts, and are provided at four locations around the opening 13. The planar position of each hole 15 corresponds to the four corners of the opening of the plate member 3 of the gantry 1.

The convex plate 21 is a plate that projects downward in the plate member 12 in a substantially vertical direction. For example, one surface of an angle member having a substantially L-shaped cross section is attached along the plate member 12, and the other surface thereof projects below the plate member 12. Let

The dotted line in FIG. 3A shows the planar position of the convex plate 21, and the convex plate 21 is provided at four locations around the opening 13. The planar position of the convex plate 21 corresponds to the outside of the cylindrical body 5 of the gantry 1 described above. That is, each convex plate 21 is provided outside the four side surfaces of the tubular body 5 having a substantially square V-shaped plane and in parallel with the side surfaces.

In addition, in the present embodiment, the position of the template 11 is adjusted by using the bolt 17 that is a vertical position adjusting means and the bolt 23 that is a horizontal position adjusting means provided on the template 11.

That is, in the present embodiment, the four bolts 17, which are vertical position adjusting means, penetrate the holes (not shown) provided at each of the four corners of the plate material 12 of the template 11 and the upper surface of the plate material 3 of the gantry 1. It is arranged in a substantially vertical direction so as to be substantially orthogonal to.

These bolts 17 are screwed into nuts 19 fixed to the plate material 12. By rotating the bolts 17 with the tips of the bolts 17 in contact with the upper surface of the plate material 3 of the pedestal 1, the template 11 is mounted on the pedestal. The position of the template 11 in the vertical direction can be adjusted by moving the template 11 in the vertical direction.

For example, when the plane is inclined when the template 11 is arranged, the bolts 17 at appropriate locations are operated (rotated) by an appropriate amount to adjust the vertical position of the template 11 to make the plane horizontal. be able to.

Further, in the present embodiment, the four bolts 23, which are horizontal position adjusting means, penetrate the holes 210 provided in each convex plate 21 and are substantially horizontal so as to be substantially orthogonal to the side surface of the tubular body 5 of the gantry 1. Are arranged in the direction.

These bolts 23 are screwed into nuts 25 fixed to the convex plate 21, and the bolts 23 are rotated and tightened with the tip of the bolts 23 in contact with the outer surface of the tubular body 5 of the gantry 1. Thereby, the template 11 moves in the horizontal direction with respect to the gantry 1, and the position of the template 11 in the horizontal direction can be adjusted.

For example, when the bolt 23 on the right side of FIG. 3(b) is tightened, the template 11 moves to the right side as indicated by the arrow a in FIG. 3(b). With respect to the left-side bolt 23 located at the position opposite to the cylinder body 5 in between, in order to enable the template 11 to move as described above, is it necessary to leave a space between the tip of the bolt and the outer surface of the cylinder body 5 in advance. The bolt 23 on the right side is rotated and tightened at the same time as it is reversely rotated to loosen the bolt 23.

For example, when the template 11 is arranged and the plane position of the hole 15 into which the anchor bolt is inserted interferes with the reinforcing bar 27 and the reinforcing bar 29, the appropriate bolt 23 is operated (rotated) by an appropriate amount to rotate the template 11 in the horizontal direction. Is adjusted so that the anchor bolts inserted into the holes 15 do not interfere with the reinforcing bars 27 and 29.

After adjusting the vertical and horizontal positions of the template 11, the bolts 23 are tightened again, and the tips of these bolts 23 are pressed against the outer surface of the tubular body 5 of the gantry 1 to fix the template 11 to the gantry 1. It is possible. That is, each bolt 23 also serves as a fixing means for fixing the template 11 to the pedestal 1.

In this way, the template 11 is installed, its position is adjusted, and the template 11 is fixed to the pedestal 1. Then, the anchor bolt 31 is attached to the template 11 as shown in FIG.

The anchor bolt 31 is inserted into the hole 15 of the template 11 from above and is held on the template 11 by using a nut 32 or the like. The anchor bolt 31 passes through the inside of the cylindrical body 5 of the gantry 1, extends downward from the opening of the plate member 3, and the lower end thereof reaches below the angle member 9. If necessary, the position of the template 11 can be readjusted by the above method after the anchor bolt 31 is installed.

After fixing the anchor bolts 31 in this way, concrete is placed in several times at the bar arrangement portion. Concrete can be poured from the opening 13 of the template 11 through the inside of the tubular body 5 of the gantry 1 and the opening of the plate material 3. FIG. 5 is a top view of the state where the concrete has been poured.

When pouring concrete, the anchor bolt 31 may be displaced due to the pouring pressure or vibration, so the position of the anchor bolt 31 should be properly checked, and the position of the template 11 should be readjusted if necessary. The position of the anchor bolt 31 should be adjusted. Even if the lower portion of the anchor bolt 31 is buried in concrete, the position can be adjusted as long as the concrete has not yet hardened.

As described above, according to the first embodiment, the gantry 1 is fixed to the reinforcing bars 27 and 29 by using the fixing jig such as the angle member 9, and the anchor bolt 31 is fixed by using the gantry 1 and the template 11. Fix it. Therefore, by fixing the gantry 1 to the reinforcing bars 27 and 29 at the upper end of the reinforced bar 1 after the bar is laid, the gantry 1 can be installed easily and accurately even in a densely arranged bar, and the anchor bolt can be installed by the strong structure of the gantry 1 and the template 11. 31 can be fixed easily and highly accurately. Therefore, it is possible to efficiently and economically construct a high-quality structure, and to perform bar arrangement without worrying about interference with the gantry 1 etc., which leads to a reduction in the construction period and labor. Further, in the present embodiment, the gantry 1 can be easily fixed to the reinforcing bars 27, 29 by sandwiching the reinforcing bars 27, 29 between the gantry 1 and the angle member 9, and the labor such as welding to the reinforcing bars 27, 29 is not necessary.

Further, in this embodiment, since the template 23 is provided with the bolt 23 which is the horizontal position adjusting means and the bolt 17 which is the vertical position adjusting means as the configuration of the template 11, the position of the template 11 with respect to the gantry 1 is finely adjusted, and the anchor is provided. The bolt 31 can be fixed with high precision.

In this embodiment, the gantry 1 has the plate material 3 and the cylinder body 5, and the bolts 17 and 23 are rotated with the tips of the bolts 17 and 23 abutting on the upper surface of the plate material 3 and the outer surface of the cylinder body 5. By doing so, the position of the template 11 with respect to the gantry 1 can be adjusted easily and quickly when pouring concrete.

Further, it is also possible to use the opening 13 of the template 11, the opening of the plate material 3 of the gantry 1, and the internal space of the tubular body 5 to pour concrete.

However, the present invention is not limited to this. For example, the planes of the pedestal 1 and the plate members 3 and 12 of the template 11 are substantially rectangular, but the present invention is not limited to this. Further, the plane of the tubular body 5 is substantially square-shaped, but the shape is not limited to this, and is not limited to the tubular shape as long as it projects from the plate member 3. In addition, the fixing jig for fixing the pedestal 1 is not limited to the one using the above-mentioned angle member 9 or the like, and it is sufficient that the pedestal 1 can be fixed to the reinforcing bars 27 and 29.

Further, the bolts 17 and 23 and the nut 32 can be removed from the template 11 and the template 11 can be removed at an appropriate time during concrete pouring, and the template 11 can be reused at other construction sites. ..

Further, the embodiment of the present invention has been described with reference to an example in which the anchor is fixed at the reinforcement portion of the joint portion of the vertical and horizontal foundation beams and columns, but the application range of the present invention is not limited to this, and various reinforcement portions It can be used when fixing the anchor to. Depending on the case, after fixing the gantry 1 to the reinforcing bars 27 and 29, it is possible to further arrange another reinforcing bar on the reinforcing bars 27 and 29.

Next, an anchor fixing method and the like according to the second embodiment of the present invention will be described. The second embodiment will mainly describe differences from the first embodiment, and configurations similar to those of the first embodiment will be denoted by the same reference numerals in the drawings and the like, and description thereof will be omitted.

[Second Embodiment]
Also in the second embodiment, after finishing the bar arrangement, as shown in FIG. 6, the gantry 1a is installed on the reinforcing bars 27 and 29, and the fixing jigs such as the bolt 7, the nut 8 and the angle member 9 are used. As in the first embodiment, the gantry 1a is fixed to the reinforcing bars 27 and 29. However, in the present embodiment, the plane sizes of the plate member 3a of the gantry 1a and the cylindrical body 5a are slightly smaller than those in the first embodiment. Note that FIG. 6A is a view of the pedestal 1a fixed to the reinforcing bars 27 and 29 as viewed from above, and FIG. 6B is a vertical direction taken along line BB of FIG. 6A. FIG. The same applies to FIGS. 7 and 8 described later.

After attaching the gantry 1a to the reinforcing bars 27 and 29 in this manner, the template 11a is installed above the gantry 1a as shown in FIG. In this embodiment, the gantry 1a, the template 11a, the angle member 9 and the like constitute an anchor fixing structure 100a for fixing the anchor.

Similar to the template 11 of the first embodiment, the template 11a is a plate material 12a having a substantially rectangular flat surface provided with openings 13 and holes 15, and a convex plate 21 is also provided on the lower surface of the plate material 12a. The arrangement of the holes 15 and the convex plate 21 is different from that of the template 11.

That is, a plurality of holes 15 are arranged side by side along each of a pair of opposite sides of the plate material 12a. The planar position of each hole 15 corresponds to the outside of the plate member 3a of the gantry 1a.

Further, as shown by the dotted line in FIG. 7A, the convex plates 21 are provided at four positions in the vicinity of the opening 13, and the plane position thereof corresponds to the inside of the tubular body 5 of the gantry 1a. That is, each of the convex plates 21 is provided inside the four side surfaces of the cylindrical body 5a having a substantially square V-shaped plane and in parallel with the side surfaces.

The vertical position of the template 11a can be adjusted by using the bolt 17 in the same manner as described above. The bolt 17 penetrates through holes (not shown) provided at four locations around the opening 13 and is arranged in a substantially vertical direction, and its lower end is in contact with the plate member 3a of the gantry 1a.

The horizontal position of the template 11a can be adjusted by using the bolts 23 in the same manner as described above. However, in the present embodiment, the four bolts 23 are arranged inside the cylindrical body 5a of the pedestal 1a so that each convex plate 21 can be adjusted. The holes 210 are provided in the above and are arranged in a substantially horizontal direction.

These bolts 23 are screwed into nuts 25 fixed to the convex plate 21, and the bolts 23 are rotated and tightened with the tip of the bolts 23 in contact with the inner surface of the tubular body 5a of the mount 1a. Thus, the template 11a moves in the horizontal direction with respect to the gantry 1a, and the position of the template 11a in the horizontal direction can be adjusted.

In this case, for example, when the bolt 23 on the right side of FIG. 7(b) is tightened, the template 11a moves to the left side as shown by the arrow b of FIG. 7(b). With respect to the left bolt 23 located at a position facing the right bolt 23, in order to allow the template 11a to move as described above, a space between the tip of the bolt and the inner surface of the tubular body 5 is set in advance, or The bolt 23 on the right side is rotated and tightened, and at the same time, it is reversely rotated to loosen the bolt 23.

Similar to the first embodiment, each bolt 23 also has a role as a fixing means for fixing the template 11a to the gantry 1. After adjusting the vertical and horizontal positions of the template 11a, each bolt 23 is tightened again. The template 11a can be fixed to the gantry 1a by pressing the tips of the bolts 23 against the inner surface of the tubular body 5a of the gantry 1a. In the present embodiment, the head of each bolt 23 is exposed in the opening 13, and it is possible to rotate the bolt 23 by inserting a hand or an instrument through the opening 13.

In this way, the template 11a is installed, its position is adjusted, and the template 11a is fixed to the pedestal 1a, and then the anchor bolt 31 is attached to the template 11a as shown in FIG.

In the present embodiment, the anchor bolt 31 is inserted into the hole 15 of the template 11a from above and is held on the template 11a by using the nut 32 or the like, so that the anchor bolt 31 passes through the outside of the plate material 3a of the pedestal 1a and moves downward. Will be projected. The lower end thereof reaches below the angle member 9 as in the first embodiment, and thereafter, the procedure for placing concrete is performed in the same manner as described above.

Also in the second embodiment described above, the same effects as those of the first embodiment can be obtained such that the gantry 1a can be easily and accurately installed in a densely arranged bar arrangement and the anchor bolts 31 can be easily and highly accurately fixed. can get. In this way, the size of the pedestal or template, the size and arrangement of the holes for inserting the anchor bolts, etc., vary depending on the number of anchor bolts and their arrangement, the size of the anchor bolts, the state of the reinforcement, etc. Can be specified.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention is not affected by the embodiments described above. It is obvious to those skilled in the art that various alterations or modifications can be conceived within the scope of the technical idea described in the claims, and those are naturally within the technical scope of the present invention. It is understood that it belongs.

1, 1a; pedestal 3, 3a, 12, 12a; plate materials 5, 5a; cylinders 7, 17, 23; bolts 8, 19, 25, 32; nuts 9; angle materials 11, 11a; template 13; openings 15, 210; Hole 21; Convex Plates 27, 29; Reinforcing Bar 31; Anchor Bolt

Claims (5)

An anchor fixing structure for fixing an anchor to a reinforcing bar,
A cradle,
A fixing jig for fixing the gantry to the reinforced bar,
A template for attaching an anchor, which is installed above the mount and can be fixed to the mount;
Equipped with,
The template anchoring structure characterized by have a vertical position adjusting means for adjusting the vertical position of the template. The anchor fixing structure according to claim 1, wherein the template has horizontal position adjusting means for adjusting the horizontal position of the template. The anchor fixing according to claim 1 or 2, wherein the fixing jig fixes the pedestal to the reinforcing bar by vertically sandwiching the reinforcing bar between the pedestal and the fixing jig. Construction. The gantry is a plate member provided with a protruding portion protruding upward from the plate member,
The plate member has an opening,
The projecting portion is a cylindrical body provided so as to surround the opening,
The anchor fixing structure according to any one of claims 1 to 3 , wherein the template has an opening. An anchor fixing method for fixing an anchor to a reinforcing bar,
A step of fixing the gantry to the reinforced reinforcing bars using a fixing jig,
Installing a template above the gantry and fixing it to the gantry, and attaching an anchor to the template;
Have a,
The position adjusting means having the above template, anchoring methods vertical position of said template and said Rukoto adjusted.

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